28394893 has 2 divisors, whose sum is σ = 28394894. Its totient is φ = 28394892.

The previous prime is 28394887. The next prime is 28394897. The reversal of 28394893 is 39849382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20766249 + 7628644 = 4557^2 + 2762^2 .

It is a cyclic number.

It is not a de Polignac number, because 28394893 - 2²¹ = 26297741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28394897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14197446 + 14197447.

It is an arithmetic number, because the mean of its divisors is an integer number (14197447).

Almost surely, 2^28394893 is an apocalyptic number.

It is an amenable number.

28394893 is a deficient number, since it is larger than the sum of its proper divisors (1).

28394893 is an equidigital number, since it uses as much as digits as its factorization.

28394893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 28394893 is about 5328.6858605101. The cubic root of 28394893 is about 305.0797713049.

The spelling of 28394893 in words is "twenty-eight million, three hundred ninety-four thousand, eight hundred ninety-three".